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Wed, 23 Sep 2026 08:24:41 -0700 (PDT) Received: from localhost.localdomain ([2001:b07:6474:ebbf:12f8:fcfa:728a:2514]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-49fe0c446e1sm55582165e9.2.2026.09.23.08.24.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Sep 2026 08:24:41 -0700 (PDT) From: Dario Binacchi To: Alexandre Torgue , Maxime Coquelin Cc: linux-stm32@st-md-mailman.stormreply.com, francesco.utel@engicam.com, linux-arm-kernel@lists.infradead.org, linux-amarula@amarulasolutions.com, domenico.acri@engicam.com, devicetree@vger.kernel.org, Rob Herring , Marek Vasut , Conor Dooley , Krzysztof Kozlowski , michael@amarulasolutions.com, linux-kernel@vger.kernel.org, Dario Binacchi Subject: [PATCH 1/2] arm64: dts: st: move Engicam MicroGEA-STM32MP257D-RMM display to an overlay Date: Wed, 23 Sep 2026 17:23:47 +0200 Message-ID: <20260923152435.563925-2-dario.binacchi@amarulasolutions.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260923152435.563925-1-dario.binacchi@amarulasolutions.com> References: <20260923152435.563925-1-dario.binacchi@amarulasolutions.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The board is fitted with different displays depending on the product variant. Keep in the board dts only what is common to all variants and move the RK050HR345-CT106A RGB panel and its touchscreen to an overlay. Signed-off-by: Dario Binacchi --- arch/arm64/boot/dts/st/Makefile | 6 ++ ...icrogea-rmm-overlay-rk050hr345-ct106a.dtso | 69 +++++++++++++++++++ .../st/stm32mp257d-engicam-microgea-rmm.dts | 49 +------------ 3 files changed, 78 insertions(+), 46 deletions(-) create mode 100644 arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a.dtso diff --git a/arch/arm64/boot/dts/st/Makefile b/arch/arm64/boot/dts/st/Makefile index 6cbccfd50993..218ff7fdf576 100644 --- a/arch/arm64/boot/dts/st/Makefile +++ b/arch/arm64/boot/dts/st/Makefile @@ -1,7 +1,13 @@ # SPDX-License-Identifier: GPL-2.0-only +stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a-dtbs := \ + stm32mp257d-engicam-microgea-rmm.dtb \ + stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a.dtbo + dtb-$(CONFIG_ARCH_STM32) += \ stm32mp215f-dk.dtb \ stm32mp235f-dk.dtb \ stm32mp257d-engicam-microgea-rmm.dtb \ + stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a.dtb \ + stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a.dtbo \ stm32mp257f-dk.dtb \ stm32mp257f-ev1.dtb diff --git a/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a.dtso b/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a.dtso new file mode 100644 index 000000000000..e64dd277ff09 --- /dev/null +++ b/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm-overlay-rk050hr345-ct106a.dtso @@ -0,0 +1,69 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2026 Amarula Solutions, Dario Binacchi + * Copyright (C) 2026 Engicam srl + * + * Rocktech RK050HR345-CT106A 5" 480x854 RGB panel with EDT FT5306 + * I2C touchscreen controller. + */ + +/dts-v1/; +/plugin/; + +#include +#include + +&i2c1 { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <&i2c1_pins_a>; + pinctrl-1 = <&i2c1_sleep_pins_a>; + i2c-scl-rising-time-ns = <185>; + i2c-scl-falling-time-ns = <20>; + #address-cells = <1>; + #size-cells = <0>; + status = "okay"; + + touchscreen@38 { + compatible = "edt,edt-ft5306"; + reg = <0x38>; + interrupt-parent = <&gpiob>; + interrupts = <0 IRQ_TYPE_EDGE_FALLING>; + reset-gpios = <&gpiod 1 GPIO_ACTIVE_LOW>; + touchscreen-size-x = <480>; + touchscreen-size-y = <854>; + }; +}; + +<dc { + pinctrl-names = "default", "sleep"; + pinctrl-0 = <<dc_pins_a>; + pinctrl-1 = <<dc_sleep_pins_a>; + status = "okay"; + + port { + ltdc_out: endpoint { + remote-endpoint = <&panel_in>; + }; + }; +}; + +&spi1 { + #address-cells = <1>; + #size-cells = <0>; + cs-gpios = <&gpioh 8 GPIO_ACTIVE_LOW>, <&gpioh 3 GPIO_ACTIVE_HIGH>; + + display@0 { + compatible = "rocktech,rk050hr345-ct106a", "ilitek,ili9806e"; + reg = <0>; + vdd-supply = <®_3v3>; + spi-max-frequency = <10000000>; + reset-gpios = <&gpiob 6 GPIO_ACTIVE_LOW>; + backlight = <&backlight>; + + port { + panel_in: endpoint { + remote-endpoint = <<dc_out>; + }; + }; + }; +}; diff --git a/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts b/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts index f5af0913bf1b..4b39b6c482d6 100644 --- a/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts +++ b/arch/arm64/boot/dts/st/stm32mp257d-engicam-microgea-rmm.dts @@ -116,25 +116,9 @@ &arm_wdt { }; &i2c1 { - pinctrl-names = "default", "sleep"; - pinctrl-0 = <&i2c1_pins_a>; - pinctrl-1 = <&i2c1_sleep_pins_a>; - i2c-scl-rising-time-ns = <185>; - i2c-scl-falling-time-ns = <20>; - status = "okay"; - /* spare dmas for other usage */ + /* dt overlays don't support /delete-property/ */ /delete-property/dmas; /delete-property/dma-names; - - touchscreen@38 { - compatible = "edt,edt-ft5306"; - reg = <0x38>; - interrupt-parent = <&gpiob>; - interrupts = <0 IRQ_TYPE_EDGE_FALLING>; - reset-gpios = <&gpiod 1 GPIO_ACTIVE_LOW>; - touchscreen-size-x = <480>; - touchscreen-size-y = <854>; - }; }; &i2c2 { @@ -179,19 +163,6 @@ sgtl5000_rx_endpoint: endpoint@1 { }; }; -<dc { - pinctrl-names = "default", "sleep"; - pinctrl-0 = <<dc_pins_a>; - pinctrl-1 = <<dc_sleep_pins_a>; - status = "okay"; - - port { - ltdc_out: endpoint { - remote-endpoint = <&panel_in>; - }; - }; -}; - &m_can1 { pinctrl-names = "default", "sleep"; pinctrl-0 = <&m_can1_pins_a>; @@ -257,23 +228,9 @@ &spi1 { pinctrl-1 = <&spi1_sleep_pins_a>; #address-cells = <1>; #size-cells = <0>; - cs-gpios = <&gpioh 8 GPIO_ACTIVE_LOW>, <&gpioh 3 GPIO_ACTIVE_HIGH>; + /* CS0 is reserved for the display fitted through overlay */ + cs-gpios = <0>, <&gpioh 3 GPIO_ACTIVE_HIGH>; status = "okay"; - - display: display@0 { - compatible = "rocktech,rk050hr345-ct106a", "ilitek,ili9806e"; - reg = <0>; - vdd-supply = <®_3v3>; - spi-max-frequency = <10000000>; - reset-gpios = <&gpiob 6 GPIO_ACTIVE_LOW>; - backlight = <&backlight>; - - port { - panel_in: endpoint { - remote-endpoint = <<dc_out>; - }; - }; - }; }; &timers2 { -- 2.43.0